Charge method of lead-acid storage battery

Abstract

The invention discloses a charge method of a lead-acid storage battery. Different charge voltage and current are controlled in six phases, wherein in the first phase of pre-charge, the battery is activated with low current; in the second phase of constant current, the battery is charged with high current; in the third phase of constant voltage, the voltage is maintained while the current is limited; in the fourth phase of trickle charge, low-current trickle charge is realized; the fifth phase realizes secondary constant-voltage charge; in the sixth phase of float charge, float charge with low current is realized. According to the method, a phase of secondary constant-voltage charge is added based on the existing five-stage comprehensive charge method, and the lead sulfide of the cathode of the lead-acid storage battery can be sufficiently decomposed in the phase, thus the lead-acid storage battery can be fully charged and is not damaged by the sulfation thereof due to insufficient charge; meanwhile, overcharge is avoided for sure, the service life of the battery is prolonged, and the charge time is shortened.

Description

technical field [0001] The invention relates to an electric vehicle battery, in particular to a charging method for a lead-acid storage battery of a new energy vehicle. Background technique [0002] In recent years, with the vigorous development of the new energy vehicle industry, the application of high-power lead-acid batteries in new energy vehicles has also received more and more attention, especially the charging of lead-acid batteries has attracted everyone's attention. Due to long-term insufficient charging of lead-acid batteries or failure to charge them in time after discharge, the batteries will be vulcanized. Therefore, the charging method of lead-acid batteries is an important subject of research. [0003] At present, the commonly used charging methods are: constant current charging method, adjusting the output voltage of the charging device or changing the resistance in series with the battery to keep the charging current intensity constant, but in the later sta...

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Problems solved by technology

[0003] At present, the commonly used charging methods are: constant current charging method, adjusting the output voltage of the charging device or changing the resistance in series with the battery to keep the charging current intensity constant, but in the later stage of charging, the charging current is mostly used for electrolysis of water to generate gas. Excessive air discharge; constant voltage charging method keeps the voltage at a constant value during the entire charging time. As the terminal voltage of the battery gradually increases, the current gradually decreases, but the current is too large at the initial stage of charging, which has a great impact on the life of the battery. , and it is easy to bend the battery plate, causing the battery to be scrapped; the stage charging method adopts a charging method combining constant current and constant voltage in stages to minimize the amount of gas output, but as a fast charging method, it is subject to certain restrictions. limit

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